So I got my Mopar bed Step..i.e., "Step Kit-Side - 82215289AB ", yesterday and mounted it. Took a couple of pictures of the mounting points. Just three bolts hold it on. Attached are the included mounting instructions and a couple of pictures.
In a nutshell:
1. Remove one existing bolt
2. Move the wire bundle (looks to be a groove in the back plate of the step to account for the wires, but I couldn't mount it without moving the wires to the side)
3. Mount the Step with the provided Three 7/8" head bolts (mounting points noted in first pic)
The top rear bolt is mounted in the frame rail, so you have to thread it blind holding the handle welded to the provided nut (see second pic). A bit of a pain, but not too bad.
Fitment is good and doesn't hit or touch anything that I can see.
I like it. I think I will order the Mopar Bed Grab handle to go with it. Wife wants something a little better to pull herself up with. She was a little spoiled with the pull out step and handle in our F150.
Edit: Added a few pics of the installed step